From: Thomas Gleixner <tglx@linutronix.de>
To: Baolin Wang <baolin.wang@linaro.org>
Cc: john.stultz@linaro.org, daniel.lezcano@linaro.org, arnd@arndb.de,
tony@atomide.com, aaro.koskinen@iki.fi, linux@armlinux.org.uk,
mark.rutland@arm.com, marc.zyngier@arm.com, broonie@kernel.org,
paulmck@linux.vnet.ibm.com, mlichvar@redhat.com,
rdunlap@infradead.org, kstewart@linuxfoundation.org,
gregkh@linuxfoundation.org, pombredanne@nexb.com,
thierry.reding@gmail.com, jonathanh@nvidia.com, heiko@sntech.de,
linus.walleij@linaro.org, viresh.kumar@linaro.org,
mingo@kernel.org, hpa@zytor.com, peterz@infradead.org,
douly.fnst@cn.fujitsu.com, len.brown@intel.com,
rajvi.jingar@intel.com, alexandre.belloni@bootlin.com,
x86@kernel.org, linux-arm-kernel@lists.infradead.org,
linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-omap@vger.kernel.org
Subject: Re: [PATCH 1/8] time: Add persistent clock support
Date: Mon, 25 Jun 2018 18:18:47 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.21.1806251815320.1821@nanos.tec.linutronix.de> (raw)
In-Reply-To: <alpine.DEB.2.21.1806232224510.8650@nanos.tec.linutronix.de>
On Sun, 24 Jun 2018, Thomas Gleixner wrote:
> The clocksource core already has all the registration/unregistration
> functionality plus an interface to reconfigure the frequency, so
> clocksources can come and go and be reconfigured and all of this just
> works.
Just for completeness sake.
If this extra suspend clocksource is not needed, i.e. because the system is
not suspended, then it does not need to be enabled. clocksources already
have an enable/disable callback exactly for that purpose. So instead of
having the clocks running during normal system operation the thing can be
OFF and save power and only be switched to ON when it is actually needed,
i.e. when going into suspend.
Thanks,
tglx
WARNING: multiple messages have this Message-ID (diff)
From: tglx@linutronix.de (Thomas Gleixner)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/8] time: Add persistent clock support
Date: Mon, 25 Jun 2018 18:18:47 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.21.1806251815320.1821@nanos.tec.linutronix.de> (raw)
In-Reply-To: <alpine.DEB.2.21.1806232224510.8650@nanos.tec.linutronix.de>
On Sun, 24 Jun 2018, Thomas Gleixner wrote:
> The clocksource core already has all the registration/unregistration
> functionality plus an interface to reconfigure the frequency, so
> clocksources can come and go and be reconfigured and all of this just
> works.
Just for completeness sake.
If this extra suspend clocksource is not needed, i.e. because the system is
not suspended, then it does not need to be enabled. clocksources already
have an enable/disable callback exactly for that purpose. So instead of
having the clocks running during normal system operation the thing can be
OFF and save power and only be switched to ON when it is actually needed,
i.e. when going into suspend.
Thanks,
tglx
next prev parent reply other threads:[~2018-06-25 16:18 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-13 11:32 [PATCH 0/8] Add persistent clock support Baolin Wang
2018-06-13 11:32 ` Baolin Wang
2018-06-13 11:32 ` [PATCH 1/8] time: " Baolin Wang
2018-06-13 11:32 ` Baolin Wang
2018-06-24 0:14 ` Thomas Gleixner
2018-06-24 0:14 ` Thomas Gleixner
2018-06-24 0:14 ` Thomas Gleixner
2018-06-25 16:18 ` Thomas Gleixner [this message]
2018-06-25 16:18 ` Thomas Gleixner
2018-06-25 17:23 ` John Stultz
2018-06-25 17:23 ` John Stultz
2018-06-25 17:23 ` John Stultz
2018-06-25 20:06 ` Thomas Gleixner
2018-06-25 20:06 ` Thomas Gleixner
2018-06-25 20:06 ` Thomas Gleixner
2018-06-26 2:12 ` Baolin Wang
2018-06-26 2:12 ` Baolin Wang
2018-06-26 2:12 ` Baolin Wang
2018-06-26 2:08 ` Baolin Wang
2018-06-26 2:08 ` Baolin Wang
2018-06-26 2:08 ` Baolin Wang
2018-06-13 11:32 ` [PATCH 2/8] clocksource: sprd: Add one persistent timer for Spreadtrum platform Baolin Wang
2018-06-13 11:32 ` Baolin Wang
2018-06-13 11:32 ` [PATCH 3/8] arm: time: Remove the persistent clock support for ARM architecture Baolin Wang
2018-06-13 11:32 ` Baolin Wang
2018-06-24 0:21 ` Thomas Gleixner
2018-06-24 0:21 ` Thomas Gleixner
2018-06-24 0:21 ` Thomas Gleixner
2018-06-13 11:32 ` [PATCH 4/8] clocksource: arm_arch_timer: Register the persistent clock Baolin Wang
2018-06-13 11:32 ` Baolin Wang
2018-06-13 11:32 ` [PATCH 5/8] clocksource: timer-ti-32k: " Baolin Wang
2018-06-13 11:32 ` Baolin Wang
2018-06-13 11:32 ` [PATCH 6/8] clocksource: time-pistachio: " Baolin Wang
2018-06-13 11:32 ` Baolin Wang
2018-06-13 11:32 ` [PATCH 7/8] x86: tsc: " Baolin Wang
2018-06-13 11:32 ` Baolin Wang
2018-06-13 11:32 ` [PATCH 8/8] time: timekeeping: Remove time compensating from nonstop clocksources Baolin Wang
2018-06-13 11:32 ` Baolin Wang
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